Materials Literature
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Tavger et Zaitsev [6] ont montré que les opérations de symétrie qui ramènent le milieu cristallin sur lui-même sont en nombre plus élevé pour un cristal antiferromagnétique que pour un cristal paramagnétique. Il faut en effet considérer les « antiopérateurs » qui sont le produit d'une opération géométrique d'espace pa…
V. S. K. Nair and G. H. Nancollas, J. Chem. Soc., 1958, 4144 DOI: 10.1039/JR9580004144
<div class="section abstract"><div class="htmlview paragraph">IT is only since World War ll that extensive study has been made of the effects of high-energy radiation on materials. However, a lack of fundamental data still prevents the making of any generalizations or detailed calculations of the effects o…
A new method is proposed for the determination of energies of activation of oxidation of metals and alloys. Metals are oxidized under conditions of linearly increasing temperature, and the activation energy may be determined from one single oxidation run. In addition the method also gives the approximate temperature r…
Vapor phase reduction of boron trichloride with hydrogen on electrically heated filaments in flow systems was investigated as a potential method for the preparation of high‐purity boron. Experiments were conducted on laboratory and bench‐scale flow reactors. Conversion efficiency was a function of mole ratio of reacta…
All single crystals of MgO which have been available contain iron-group impurities in quantities easily detectable by e.s.r. absorption. For a given impurity, the fractions in the di- and tri-valent states depend in part upon the past heat treatment and upon the concentrations of the other impurities. Energetic radiat…
Abstract not Available.
D. R. Rosseinsky, Trans. Faraday Soc., 1958, 54, 116 DOI: 10.1039/TF9585400116
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPolysoaps. II. The Preparation of Vinyl Soaps1HAROLD H. FREEDMAN, J. PHILIP MASON, and A. I. MEDALIACite this: J. Org. Chem. 1958, 23, 1, 76–82Publication Date (Print):January 1, 1958Publication History Published online1 May 2002Published inissue 1 January 1958https://pubs.a…
Two Aerobee rockets were employed to eject relatively large amounts of sodium vapor into the earth's atmosphere. One of the flights occurred during evening twilight and sodium was placed in the sunlit atmosphere from 75 to 110 km. Sodium D-line emission (λ 5890 A) was observed in the ejected trail above 90 km, and 589…
J. Scanlan and W. F. Watson, Trans. Faraday Soc., 1958, 54, 740 DOI: 10.1039/TF9585400740
M. F. C. Ladd and W. H. Lee, Trans. Faraday Soc., 1958, 54, 34 DOI: 10.1039/TF9585400034
S. Ahrland, J. Chatt, N. R. Davies and A. A. Williams, J. Chem. Soc., 1958, 264 DOI: 10.1039/JR9580000264
Abstract Pressure differences between foam bubbles of unequal size are the cause of gas transfer from small to larger bubbles. The rate at which the small bubbles decrease in size is calculated as a function of the radius of the bubbles, the surface tension of the liquid and the thickness and permeability of the liqui…
The first page of this article is displayed as the abstract.
Phase relationships in the system were determined in air in the range between and , using solid state and quenching methods. Three congruently melting compounds exist, , , and . The orthophosphate has a sluggish, reversible inversion at 942° and melts at 1060°±8°C. The pyrophosphate undergoes a rapid, reversible inver…
Abstract Intrinsic viscosities of cellulose acetates of degrees of substitution 2.86 and 3.00 and of cellulose trinitrate have been investigated as functions of temperature, solvent, and molecular weight. Large negative temperature coefficients ( ca. −0.6% per degree) of [η] appear to be characteristic of cellulosic c…
The first page of this article is displayed as the abstract.
An investigation was started on the solid solubility range of oxygen in alpha -zirconium. The solubility limit for samples heat-treated at 8O0 C was found to be about ZrO/sub 0.40. After annealing at 800 C, the sample ZrO/sub 0.30 gives x-ray powder photographs which show the oxygen atoms to be distributed at random i…
By the use of a feedback amplifier technique, the voltage appearing across a search coil wound on a ferromagnetic core can be made to follow any desired driving waveform, and the inherent harmonic distortion effects arising from non-linear B/H characteristics are reduced by an amount approximating to the loop gain. Th…